
# 打印 1 ~ 20 的整数，打印在一行内
# 1 2 3 4 5 6 ...... 19 20
# 打印上述 10 行

x = 1
while x <= 10:
    i = 1
    while i <= 20:
        print(i, end=' ')
        i = i + 1
    print()  # 打印一个换行符'\n'
    x += 1




